Posted on 11th September 2017 by melyn Undon is the Cornish word for monotonous Yes, monotonous in Cornish is undon Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Kompella is the Cornish word for compelNext post: Kenedhlegi is the Cornish word for nationalise